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Water purification and defluorination material based on amorphous zirconia and preparation method of water purification and defluorination material

A zirconia, amorphous technology, applied in zirconia, chemical instruments and methods, water pollutants, etc., can solve the problems of limiting the practical application of zirconia-based adsorption materials, unfavorable exposure of adsorption active sites, and small specific surface area of ​​zirconia , to achieve large-scale preparation, prevent incomplete release of HCl, and large specific surface area

Pending Publication Date: 2022-06-07
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The specific surface area of ​​zirconia prepared by traditional hydrothermal method and precipitation method is relatively small, which is not conducive to the exposure of adsorption active sites, which limits the practical application of zirconia-based adsorption materials.
Some research reports try to introduce soft templates such as block copolymers and surfactants, or hard templates such as mesoporous silica during the synthesis process, so that zirconia can nucleate, grow and stack on the template, and then its pore structure can be adjusted. Or morphology, and then increase the specific surface area, but there are problems such as complex synthesis process, high cost and unfavorable for large-scale preparation

Method used

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  • Water purification and defluorination material based on amorphous zirconia and preparation method of water purification and defluorination material
  • Water purification and defluorination material based on amorphous zirconia and preparation method of water purification and defluorination material
  • Water purification and defluorination material based on amorphous zirconia and preparation method of water purification and defluorination material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the first step, the oven is preheated to a set temperature of 230 ° C;

[0034] In the second step, weigh 1.0 g of ZrOCl·8H 2 O powder, placed in a 100 mL beaker;

[0035] In the third step, the beaker is quickly transferred to the preheated oven, and the heat decomposition is 10min;

[0036] The fourth step, to be cooled to room temperature, washed several times with a large amount of deionized water, and then washed twice with ethanol, placed in a 60 ° C oven to dry, you can get an amorphous zirconia material.

[0037] Figure 1 Scanning electron microscopy of amorphous zirconia prepared for the present embodiment, it can be seen that there is a large pore structure at the edge;

[0038] Figure 2 XRD diagram of an amorphous zirconia adsorption material prepared for the present embodiment;

[0039] Figure 3 N of amorphous zirconia prepared for the present embodiment 2 Suction desorption curve and pore size distribution plot (internal figure), indicating that the zirco...

Embodiment 2

[0042] In the first step, the oven is preheated to a set temperature of 210 °C;

[0043]In the second step, weigh 1.0 g of ZrOCl·8H 2 O powder, placed in a 100 mL beaker;

[0044] In the third step, the beaker is quickly transferred to the preheated oven, and the heat decomposition is 10min;

[0045] The fourth step, to be cooled to room temperature, washed several times with a large amount of deionized water, and then washed twice with ethanol, placed in a 60 ° C oven to dry, you can get an amorphous zirconia material.

Embodiment 3

[0047] In the first step, the oven is preheated to a set temperature of 250 ° C;

[0048] In the second step, weigh 1.0 g of ZrOCl·8H 2 O powder, placed in a 100 mL beaker;

[0049] In the third step, the beaker is quickly transferred to the preheated oven, and the heat decomposition is 10min;

[0050] The fourth step, to be cooled to room temperature, washed several times with a large amount of deionized water, and then washed twice with ethanol, placed in a 60 ° C oven to dry, you can get an amorphous zirconia material.

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Abstract

The invention relates to the technical field of water pollution control, particularly discloses a water purification defluorination material based on amorphous zirconia and a preparation method thereof, and more particularly discloses amorphous zirconia and a preparation method and application thereof. According to the invention, the zirconium oxychloride hydrate is subjected to thermal decomposition at 210-250 DEG C to prepare the amorphous zirconium oxide with rich mesoporous structures. The preparation method provided by the invention is simple in process, low in raw material cost, low in equipment requirement and capable of realizing large-scale and macro-quantity preparation. The amorphous zirconia prepared by the method has a large specific surface area and abundant adsorption sites, shows excellent adsorption performance in treatment of fluorine-containing water, has an adsorption capacity of 48.4 mg / g, has a fast adsorption rate, and has a wide application prospect in deep purification of fluorine-containing water.

Description

Technical field [0001] The present invention relates to the field of water pollution control technology, in particular to a water purification fluorine removal material based on amorphous zirconia and preparation method thereof, more particularly to an amorphous zirconia and preparation method and application thereof. Background [0002] The problem of fluoride pollution in groundwater and surface water has become a major hidden danger in the environmental field, threatening the health of all mankind. Although fluorine is one of the essential trace elements of the human body, once the human body consumes excessive amounts of fluoride, it will affect the bone structure and cause diseases such as dental fluorosis and bone fluorosis. Therefore, the World Health Organization (WHO) sets the maximum value of fluoride content in drinking water to 1.5mg / L, while China's standards are more stringent, stipulating that the concentration of fluoride in drinking water does not exceed 1.0mg / L....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02B01J20/06B01J20/30C02F1/28C02F101/10C02F101/14C02F101/20
CPCC01G25/02B01J20/06C02F1/281B01J2220/4806C02F2101/14C02F2101/20C02F2101/105C01P2004/03C01P2002/72Y02W10/37
Inventor 黄宇雄谭贤军江振颖仉铭坤
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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